C71

C71 may refer to :
 * Honda C71, C76, C72, C77 Dream, motorcycle different models
 * Brain tumor ICD-10 code
 * Ruy Lopez, chess openings ECO code
 * Caldwell 71 (NGC 2477), an open cluster in the constellation Puppis

C-71 may refer to :
 * C-71 (Michigan county highway)
 * C-71 Executive, an aircraft